<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Test: Margin collapsing with clearance - Margins collapsing of an element's top margin with its first in-flow child should not be affected by clear and clearance</title>

  <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" />
  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
  <link rel="author" title="Bruno Fassino" href="fassino[at]gmail.com" />
  <meta content="When an element with clear set to it (to other than 'none') has a first in-flow child and their top margins are adjoining, then these margins should collapse normally." name="assert" />
  <meta content="" name="flags" />

  <style type="text/css">* { margin: 0; padding: 0 }<![CDATA[
  #relatively-positioned-wrapper
  {
  position: relative;
  }

  #parent-lime
  {
  background-color: lime;
  border-top: black solid 1px;
  width: 50%;
  }

  #float-left-blue
  {
  background-color: blue;
  float: left;
  height: 100px;
  width: 100px;
  }

  #clear-left
  {
  clear: left;
  }

  #clear-left div
  {
  background-color: aqua;
  height: 60px;
  margin-top: 140px;
  }

  #next-yellow
  {
  background-color: yellow;
  height: 100px;
  }

  .ref-overlapped-red
  {
  background-color: red;
  left: 0;
  position: absolute;
  z-index: -1;
  }

  #ref1
  {
  height: 200px;
  top: 1px;
  width: 50%;
  }

  #ref2
  {
  height: 100px;
  top: 201px;
  width: 100%;
  }
  ]]></style>

 </head>

 <body>

  <p>Test passes if there is no red visible on the page.</p>

  <div id="relatively-positioned-wrapper">

   <div id="parent-lime">
    <div id="float-left-blue"></div>
    <div id="clear-left">
     <div></div>
    </div>
   </div>

   <div id="next-yellow"></div>

   <!--
   #ref1 and #ref2 boxes create a sort of 'reference rendering' where #ref1 should be covered, overlapped by #parent-lime while #ref2 should be covered, overlapped by #next-yellow.
   -->

   <div id="ref1" class="ref-overlapped-red"></div>
   <div id="ref2" class="ref-overlapped-red"></div>

  </div>

 </body>
</html>